The latest twist: An email blast Tuesday afternoon from Sullivan highlighting that the Texas Ethics Commission recently rejected on a technicality Bresnen’s latest ethics complaint filed against Empower Texans and Sullivan. That complaint alleged Sullivan violated state ethics laws by using assets from a nonprofit to solicit funds for a political action committee.

In a letter dated Wednesday, the state’s campaign finance regulators informed Sullivan that Bresnen complaint, filed on Jan. 8, did not “comply with legal and technical form requirements for a complaint filed with the Texas Ethics Commission.”

According to the Ethics Commission letter, Bresnen did not provide the “position or title of the respondent” in his complaint. The commission gave him 21 days to re-file the complaint.

“It seems he doesn’t know how to correctly fill out forms,” Sullivan wrote. “I have no doubt Bresnen will continue to use the regulatory process in attacking me and my organization! And he’ll keep embarrassing himself along the way.”

Within minutes, Bresnen responded, saying he re-filed the complaint last week with all the necessary info.

“Mike just doesn’t know it yet,” Bresnen said. “He shoots from the lip when he should be answering the substance of the complaints.”

It’s the latest round of barbs between Bresnen and Sullivan.

Keep in mind: Sullivan also faces a separate Bresnen-originated ethics complaint for failing to register as a lobbyist. That issue is pending before the Texas Ethics Commission.

And the back and forth on Tuesday started in the morning when Bresnen filed a petition with the Texas Ethics Commission for rulemaking to require dark money disclosure, specifically pointing to Sullivan and Empower Texans as a reason why he’s asking the ethics panel to step in on that front.